In RHEV-M/oVirt, how do I find the VM associated with a particular MAC-address

I'm trying to use the manager to find a VM associated with a particular MAC-address. I'm using the search-bar in the WUI. The RHEV-M guide and oVirt CLI examples get me only so far. In the search bar, I try VMS: vnic.network_name = X* and I get all VMs with an interface in any of the X... networks. But I want to search on the mac address. Tried the obvious, (mac, mac-address, mac_address) but no go. For comparison, I tried "00*" which definitely should have gotten hits.